121420402 has 4 divisors (see below), whose sum is σ = 182130606. Its totient is φ = 60710200.

The previous prime is 121420391. The next prime is 121420501. The reversal of 121420402 is 204024121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 105904681 + 15515721 = 10291^2 + 3939^2 .

It is a super-3 number, since 3×121420402³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30355099 + ... + 30355102.

Almost surely, 2^121420402 is an apocalyptic number.

121420402 is a deficient number, since it is larger than the sum of its proper divisors (60710204).

121420402 is an equidigital number, since it uses as much as digits as its factorization.

121420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60710203.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 121420402 is about 11019.0926123706. The cubic root of 121420402 is about 495.1809045272.

Adding to 121420402 its reverse (204024121), we get a palindrome (325444523).

The spelling of 121420402 in words is "one hundred twenty-one million, four hundred twenty thousand, four hundred two".